I painted a 76 camino once and did it one panel at a time. I didn't sand down to primer but only far enough to get the panel smooth.
I wiped the panel twice with solvent to get the paper dust and oil/grease off and shot the panel with spray can primer. I had a had a friend who knew what he was doing shoot the top coat, in my driveway. I used a single stage enamel and wet sanded after about 30 days. Then I waxed the crap out of each section. The paint wasn't going to win any trophies but it was solid and looked pretty good. The paint lasted over two years until my mom T-Boned someone who ran a stop sign. (A whole nother story) The insurance totaled the camino and there wasn't enough left to buy back so I don't know how much longer the paint would have lasted but I bet another couple of years.
I wiped the panel twice with solvent to get the paper dust and oil/grease off and shot the panel with spray can primer. I had a had a friend who knew what he was doing shoot the top coat, in my driveway. I used a single stage enamel and wet sanded after about 30 days. Then I waxed the crap out of each section. The paint wasn't going to win any trophies but it was solid and looked pretty good. The paint lasted over two years until my mom T-Boned someone who ran a stop sign. (A whole nother story) The insurance totaled the camino and there wasn't enough left to buy back so I don't know how much longer the paint would have lasted but I bet another couple of years.